Anyone Working on T-Mobile Wifi Calling?

Just purchased a 925F (international version) and am on T-Mobile US for a carrier. I came from an HTC one (M7) (also international version), and the devs on those forums had managed to figure out how to extract the bits required for T-Mobile Wifi calling and bake them into their custom ROMs. There is really no current development going on under the T-Mobile sub-forum for this device, so I am using one of the custom ROMs from the general forums...without my beloved Wifi calling. Just wondering if anyone was working on this. If not, I will just have to wait and see if anyone starts development for the T-Mobile version again.
Thanks.